| The word science is heard so often in
modern times that almost everybody has some notion of its meaning. On the other
hand, its definition is difficult for many people. The meaning of the term is
confusing, but everyone should understand its meanings and objectives. Just to
make the explanation as simple as possible, suppose science is defined as
classified knowledge (facts). Even in the true sciences distinguishing fact from fiction is not always easy. For this reason great care should be taken to distinguish between beliefs and truths. There is no danger as long as a clear difference is made between temporary and proved explanations. For example, hypotheses and theories are attempts to explain natural phenomena. From these positions the scientist continues to experiment and observe until they are proved or discredi A. is not always as pure as we suppose B. necessarily results from applied science and the discovery of a cell C. may lead to antiscientific, "impure’ results D. necessarily precedes applied science, leading to the discovery of the cell [单项选择]浅表性胃炎
A. 黏膜失去正常橘红色，皱襞变细平坦，黏膜下血管透见如树枝状或网状 B. 黏膜充血水肿，呈花斑状红白相间的改变 C. 常有簇状出血病灶，可见于全胃或累及一部分 D. 病变可呈弥漫性改变，也可仅见于胃窦部黏膜的卡他性炎症 E. 胃黏膜出现膨大皱襞或丘疹样凹陷 [多项选择]关于硬膜外隙的描述正确的是（）
A. 硬脊膜与椎管内面的骨膜及棘间韧带之间的狭窄腔隙 B. 硬脊膜与椎管内面的骨膜及黄韧带之间的狭窄腔隙 C. 有脊神经根通过 D. 略呈负压 E. 硬膜外麻醉即将药物注入此隙 [单选题]当呼吸系统、皮肤和眼睛需要最高级别的保护时，应该穿戴( )。
A.D级防护服 B.C级防护服 C.B级防护服 D.A级防护服 [单选题]焊接时,关于焊芯作用说法错误的是( )。
A.传导焊接电流,产生电弧把电能转换成热能 B.焊芯本身熔化作为填充金属与液体母材金属熔合形成焊缝 C.作用不大,可以去除 [多选题]“三遥”馈线终端采取防误措施，过滤误遥信，软件防抖动时间符合配电自动化终端技术规范要求的是(____)。
A.5ms B.10ms C.100ms D.200ms [判断题]信贷管理系统中合同为已生效状态可以发起变更；合同为冻结、终止状态不可以发起变更。
A.正确 B.错误 [多选题]一个完善的营养教育项目应该包括（ ）。
A.了解教育对象 B.制订营养教育计划 C.教育前期准备 D.确定营养教育途径和资源 E.实施营养教育计划并进行效果评价 我来回答: 提交
|
